Drafting instrument.



R. F. Mc'INTIRE. DRAFTiNG INSTRUMENT.

APPLICATION FILED MAY 10. I916.

Patented y 8, 191?.

.ROY F. MCINTIRE, OF BELLA, IOWA.

DRAFTING INSTRUMENT.

Specification of Letters Patent.

Patented May 8, 1917.

Application filed May 10, 1916. Serial No. 96,650.

To all whom it may concern Be it known that I, ROY F MoIN'rrnn, a citizen of the United States, residing at Fella, in the county of Marion and State of Iowa, have invented new and useful Improvements in Drafting Instruments, of .xlllCll the following is a specification.

This invention relates to a drafting i11- strument and has for its primary object to form a single object capable of present ing a number of angles.

riimther object of he invention is to provide a device having a number of flat faces. the corners formed at the juncture of the faces being arranged at *arious angles to each other.

.chllOillQl' object of the invention is the manner of forming these faces so that a good purchase can be had between the device and the fingers of the user.

With these and other objects in view the invention consists in the construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing and pointed out in the claim hereunto appended.

In the drawing:

Figure l is a perspective view of the device in its solid form,

Fig. 2 is a perspective view of the device when made hollow 3 is a sectional view on line 33 of Fig. F l is a diagrammatic view of the faces of mv invention.

he block 1 may be cast solid as illustrated in Fig. 1 or formed in sections so as to be hollow as illustrated in Figs. 2 and 3. The block is formed with four faces indicated by the numerals 2, 3, 4, and 5' The face 2 which is in the form of a right angle triangle, the hypotenuse of which being arranged a a degree angle. The face 3 is in the form of a right angle triangle with the hypotenuse arranged at a 60 degree angle and the same is true of the face indicated by the numeral 4'. The face 5 has all of its edges arranged at an acute angle to each other. It is of course to be understood that the hypotenuse of the face 3 and the hypotenuse of the face a will represent 60 degrees when in one position whereas they will represent degrees when in another position. In Fig. 2 of the drawing it will be seen that the major portion of the face is depressed so as to form shoulders 6 arranged to be engaged by the user so as to readily lift the object or block of any u'face. ll hen considering the manufacture of the device I wish it to be understood that I do not desire to be limited to the manner of making the device as illustrated in the drawing as three sides of the face may be stamped from a single sheet of n'iaterial while the fourth face may be secured to the first mentioned face in any suitable manner orthe whole body ot' the device may be stamped from a single sheet of material and have the edges secured in any suitable manner.

From the foregoing description taken in connection with the accom mnying drawing it should be apparent that I have provided a. device which is admirably adapted for the purpose for which it is intended. that the device is simple, durable and efiieient of construction and that the device may be manufactured and sold at a comparatively low cost.

Changes in the form, proportion and minor details of construction may be made within the scope of the claim without departing from the spirit orsacrificing any of the advantages of the invention.

l Vhat- I claim is:

is a new article of manufacture, a drafting block having four fiat faces, two faces being identical and each in form of a right angle triangle, the hypotenuse of each be ing disposed at angles of sixty and thirty degrees to the sides thereof, and having face in the form of right angle haying its hypotenuse at an angle of forty five degrees to its sides, the remaining face being formed of a triangle all the edges of l are being arranged other.

Val .3 1116 at acute angles to each In testimony wh reef l: afiix my signature in presence of two witnesses.

ROY F. MGINTIRE. ll itnesses CEoIL C. Jones, RALPH M. MGINTIRE.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents Washington, 1). C. 

